package com.itheima.interceptors;

import com.itheima.utils.JwtUtil;
import com.itheima.utils.ThreadLocalUtil;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

import java.util.Map;

@Component
public class LoginInterceptor implements HandlerInterceptor {
@Autowired
    private StringRedisTemplate stringRedisTemplate;
 @Override
    public boolean preHandle (HttpServletRequest request, HttpServletResponse response,Object handler) throws  Exception{
     // 令牌验证
    String token =   request.getHeader("Authorization");
//验证token
    try {
        // 从readis获取相同的token
        ValueOperations<String,String> operations =stringRedisTemplate.opsForValue();
        String redisToken = operations.get(token);
        if(redisToken == null){
            // token失效抛出异常，将执行catch
            throw new RuntimeException();

        }

        //把业务数据存到ThreadLocal
        Map<String,Object> claims = JwtUtil.parseToken(token);
        ThreadLocalUtil.set(claims);
        return true;
    } catch (Exception e){
        response.setStatus(401);
        return false;
    }

    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        ThreadLocalUtil.remove();
    }
}
